Object oriented approach is growing very fast in various applications of the computer science. Those applications may contain a lot of entity relationships which, need to be understood by the maintainers. An approach for formally defining slices for object oriented programs is an important problem in the maintenance phase. This research proposes definitions of slices for object oriented programs. Basic relations such as Usage, Affect and Inheritance are defined, and they are extended to a family of dependence relations between entities in object oriented programs and defines slicing...